The more far-fetched ones:
Marie-Neige = Evil Rarity
Marie-Lune = Good(?) Rarity
Laurence = A toned down Pinkie Pie.
Flore = Maud Pie
Saki = Um… an introverted Rainbow Dash? I can’t think of any grumpy pony in the main or supporting cast. Oh but how about Ember? XD

As for the kids… well, for the lack of alternatives, the CMCs I guess? But then their “big sisters” would be Saki (if she’s RD), Gaia and Marie, so Mimi would have to switch and I’m not sure I want to see that.

My version of cast.
Clementine = an obvious Fluttershy due to her soft and timid nature.
Chloe = Applejack, as a person who is nothing extraordinary but have a lot of good qualities such as kindness, friendliness and honesty.
Gaja = Rainbow Dash: sporty, brave and straightforward.
Marie-Neige = Pinkie Pie: easygoing, positive, but with, hm, some strange sides.
(Marie-Luna = Pinkamina? Or is it vice versa, and Marie-Luna is here a “nice one”?)
Flore = Twilight: introverted, intelligent, has some strange magical things in her house.
…Saki=Rarity? A far-fetched one but possible. Both can often be unfriendly, but leave it out when it’s the question of something that truly matters.
BTW, in this version we have a perfect with for CMCs: it is that three who has already got a kid sidekick.

I guess aside from Clem we’ll have to agree to disagree, but it’s interesting to see how someone else tackles the mapping. :-)
Since the characters are obviously not identical to the ponies, the result is different, depending on which character traits you look at.

Ooooh, maybe Marie gets a Sweetie-bot, because no real child can endure her presence.
Then Mimi would have to be Spike, but somehow I don’t think child abuse is funny when it’s done to a child that actually behaves like a child. Note that there are times when I don’t find the Spike abuse funny, either.

Actually – Marie-Neige does have a sidekick – In “Star Trek” lore ==> Her sidekick is the redshirted 5th/6th member of the away team that no one knows, no one remembers, and ==> to put it nicely, keeps disappearing and is never seen again, even previous shows of the storyline…

Clementine might be the ultimate red shirt. Her outfit is the Frivolverse version of the redshirts’ uniform and Clementine is actually more of a codename than actual full name. Sort of why James Bond can look like either Sean Connery, Roger Moore, George Lazenby, Timothy Dalton, Pierce Brosnan, Daniel Craig and David Niven !

A kid sidekick for Marie? Wow…I’m not sure who you would pair with her. Cloe and Saki have fans. Gaia and Eleonore seem much more like friends. Would you attach Marie to…say someone who…I don’t know…can barely tolerate her, or would that be considered cruel? ( to Marie that is)